Whistle.



E. e. RAFF.

WHISTLE.

APPLICATION FILED APR. m. 1913.

Patented Dec. 31, 1918.

' ERNEST e; RAFF, or sr. Louis, MISSOURI, ASSIGNOR To LIBERTY AccE ssoRIs CORPORATION, or ST. LOUIS, MISSOURI, .A CORPORATION or ivirssoo m .WHsTLE.

Specification of Letters Patent. "Patented Dec. 31 1918.

Application filed April 1913. seriarno. 227,764.

L; 1To all wh0m-z't mag concern Be; it.-known-'th'at- I, ERNEs'rG."RAFF, a citizen ofithe United States, residing at -the city. of St,Louis,- State: of Missouri, r'have' -invented certain new andusefulImprove t-mentsz .in Whistles; of which the following isa.specification. v.

This invention relates toi'fwhistlespr sig nal ingdeviceseof thez typethat is operated lo byrthee-exhaust gases of antomobile engines,

andAJhas-ZfOr its-main:object tot-provi'de a wwhistle Whiehe' anE-bereadilyattached to the exhaust manifold :of the engine and which visadaptedgtojbeoperated by :a i portion of .the gases thatpassesthroughsaid manifold. v @Anothenobject isto-provide a whistle of{the characterreferredto which emits a fi'soft gzand tpleasing sound,-the pitch of. which can I bevaried atthe will-of the operator.

: Another: object 'istto, provide aswhistle of the -charac ter.referredntothat is accessible 0r purposes of ic leaning;-repair;-etc.Other gwohjectsandgdesirablefeatures of myv inven- 1 ti-on-willbehereina-fter set out.

- Onehtycot so-c'alled' exhaust horn 3' or whistle with which; I amfamiliar is adapted .,-..;t0-,.be; arrangedattheextreme. rear end of{the exhaust pipe'.u;i-T-h -is typewis open to twoseriousl-objeftions,namely the fact that 30... 1t is vquickly rendered inefficient byaccumufclations of road dust and mud and 'the fact that when the entireexhaust gases are divertedufrom their-usual path of travel to operatethe whistle considerable back pressure is produced-which materiallyaffects I thegoperation of the engine. Another type .of whistleiisadaptedtobeoperated by the j Jeompressedggases lin nthe cylinders of the40 to have finely ground and seated valves to ,op crate against therelatively high cylinder ijpressure, and,furthermore, gives forth a I'l'shrill, unpleasant sound,-dne--to 'thehighoperating: pressure. Thistype .ralso affects 5. ithe .efliiehcy of the enginemwing to the factthat whenever the whistle is operated the 1 Compression. in.theiparticular cylinder with I whirh thewhistle is; connectedistmater-ially thereof equippedwith a-vwhjistleiconstrnctedimprovedxwhistle is' connected to the exhaust'manifold 'of the engine insuch a Imanner that onlya'portion of the-exhaust gases *passing' through"said "manifold is utilized to operate the-whistle, and,= therefore,it-- will be :fobvious that wheneverfmy whistle is operated the efiectwill *be actually beneficial" to: the. engine; 'in 'that s-aid" kwhistlems virtually as E a: muffler tint-out tere- 1ieve; someofthewbaclcpressure that is caused by, the gases passing 'through* themuffler.

"My whistle. comprises fewsimple partsion which no accurate machineworlcis-neces sary,= which can Cberprodu'ced" at 1 a low: cost of;manufacture and which can be assembled.-

and-installed by unskilled labor. a

" In; .theaCcompanyihg drawings forming 'tional vi'eW' f-Ya' portionofan automobile.

showing the exhaust manifold of the 'motor in accordance with myinvention; v Fig. is'aafan enlarge'd longitudinal sectional viewr-of thewhistle; r :Fig; 3 is anwelevational viewfof' the elbow lnemloer,*looking in the direction of the arrows as indicated-in Fig-2; I

Fig. 4 is a perspective view of the-elbow member and v Fig. 5 is aperspective view of the plunger. Briefly describedglny inventionconsists in an automobile "whistle provided with means 2 controlled by 1the operator I of w the automobile. for? varying:- the pitch 0f: the-soundemitted therefrom and. .which is con engine, but hasthedi'sadvantage-iof having "-structod--in; suchwaw manner" that'it canbe I easily and quickly i'nsta-lled or the exhaust:

manifold 'of-va'rious stylesef internalcombustion:engines. a

Referring to the drawingspwhich"illus- ,-;trate one form of'my'inventiomA designates an internal 1 combustion engine provided.

with the usual exhaust manifold B th'rough Whirh thedischargedgasespassontheir way to the mu 'fler (notshown){eMyimprovedqwhistle comprises a tubej or parttof thisispeeification,which like -n'1imbcrs-of reference denote like parts wherevertheycoccur, I

means of a suitable fastening devlce, such,

- ti-allyclosed end beingfor the purpose of The edge of the walls:around the opening 11 is rounded by bend-l 7 is provided with a reducedlower end havthroat 6,"said restriction being formed by ing exteriorscrew threads 3, there being a shoulder 4' at the juncture of thereduced end and the other part of the elbow member. The elbow member isprovided with a port 5 extending axially therethrough, the upper end ofsaidport being restricted to form a an abutment 7 preferably formedintegrally with the elbow member, so that the upper end ofthe elbowmember presents a solid front with the exception of the restrictedthroat 6. An annular groove 8 is formed in the solid front face ofthe'elbow member, into whi'hone end of the tube'is secured by "forinstance, as set screw 10. The other end .[Of the tube-' is spun-0rotherwise suitably I forcing 't-he tone.

drawn together, so as to leave'a small orifice 11, to be hereinafterreferred to, said paring the edges of the" metal back, as at 12.

1.: Within the tube a plunger 13 is slidably mounted and is providedwith a lug 14:, to

- which one end'of the operating cord or ca- ,wble 15 is secured, theother end of the cable extending to a point within the automobile towhich the whistle is attachedfor convenience ofeoperationbythe driver ofthe machine. A spring 9 is mounted in the tube .1 back of the plunger13'. and tends normally 5'; to force theplunger toward the elbow mem- 40The plunger 13 is provided with an anj space '18, within groove 8', saidlug 17 having a flat throat-closing portion which is ber2.

nular lug 17, which is adapted to fit in a adapted, when the plunger isin normal p0:

' sitiont'o enter and close the restricted throat 6, which is flat onone side, so as to be adapted to coeperate' with flat part 16.

Thus the abutment 7 is encircled within the recess formed in the plunger13 between the lugs 16 and 17 when the plunger is in its normal closedposition, whereby a tight oint ;:.1s formed between these parts whentheyare in. closed position, thereby preventing the exhaustfrom the manifoldoperating the a;,s1gnal.'- Of course, it will be understood that the tooface of the abutment 7 is flat, as isus'ualin whistles.

tion: of the gases from the exhaust'pipe to pass through said throatinto the tube, from which the gas escapes through the exit port 19 ofthe tube 1 and produces a musical Whistling sound. By moving the plungeror piston valve 13 toward or away from the abutment-7, the pitch of thesound emitted from the exit port 19 can bevaried at will, and when theoperator releasesthecord 15 the plunger 13 will, under the'influence ofthe spring 9, return to its normal closed po-' sition, thereby closingthroat 6, and thus automatically prevent the exhaust gases from actingon the sound-producing means of the whistle. 7

In practice I arrange the operating end of the cable or ord 15 adjacentthe steering wheel of the automobile andhave the said 7 cord passthrough suitable eyelets or pulleys 20 arranged in the dash of theautomobile, but the particular manner of leading the operating cable towithin convenient reach of the driver of the automobile can be varied atwill.

In the drawings I have shown the whistle asbeing arranged in asubstantially'horizon ftal position on the exhaust; manifold orpipe,'but it is obvious that said whistl'e'could 'be'arrang'ed'in aninclined position without changing the 'mode or result" of operation,

1 From the above it will be se'en that I have devised a whistle forautomobile engines that is' easily accessible for the purposeofcleaning, repairing, etc that is not exposed to road dust and mud thatwill emit a pleasing musical sound, owing to the fact thatit is operatedby the gases in the ex- 'haust'pipe which'are of only a few poundspressure; 'a whistle in which the pitch of the sound v emittedtherefromcan be'varied" at will of theoperator'; that comprises few and simpleparts that can be man'ufactured cheaply and which can be readilyinstalled on the exhaust manifold or pipe or on an automobile engine bysimply threading a hole in the exhaust manifold or pipe at anyaccessible oint between the engine and the 1 usual manifold."

Having thus described this invention, I

hereby reserve the benefit of all changes in form, arrangement, order.or insect parts,"-

as it isevidentthat many minor changes may be made therein withoutdeparting from the spirit of this invention or the scope 'of' thefollowing claimi t "I claim: M v 1" Awhistleof the character described,comprising a'hollow' memberformed on one'e'nd with an annular groove,the inner wall there- When the'cord or'cable 15 is pulled bytheoperator'in a direction to compress the spr1ng'9, the piston valve orplunger 13 is qmwithdrawn from the throat 6 and uncovers the exit port19 of the tube and allows a por-" of having a flat'surface, the said endof the hollow member having an inlet openingone wall of which is flatand in, alinement with opening, a reciprocal valve in the tubularwhereby when said valve is moved the pitch member, said valve having anannular flange tone of the Whistle Will be altered by the flat at itsinner end, the inner edge of said flange surfaces and the distance theinner end of 10 having a flattened portion to register With the valve isfrom the groove.

the flat surface in the annular groove when In testimony whereof Ihereunto aflix my the flange is seated in said groove, and meanssignature.

for Withdrawing the flange from the groove ERNEST G. RAFF.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. O.

